<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
<head>
<style type="text/css">
/**
 * This is a CSS stylesheet that defines three style rules that we use
 * in the body of the document to create a "window" visual effect.
 * The rules use positioning attributes to set the overall size of the window 
 * and the position of its components. Changing the size of the window
 * requires careful changes to positioning attributes in all three rules.
 **/
div.window {  /* Specifies size and border of the window */
    position: absolute;            /* The position is specified elsewhere */
    width: 300px; height: 200px;   /* Window size, not including borders */
    border: 3px outset gray;       /* Note 3D "outset" border effect */
}

div.titlebar {  /* Specifies position, size, and style of the titlebar */
    position: absolute;      /* It's a positioned element */
    top: 0px; height: 18px;  /* Titlebar is 16px + padding and borders */
    width: 290px;            /* 290 + 5px padding on left and right = 300 */
    background-color: #aaa;  /* Titlebar color */
    border-bottom: groove gray 2px;  /* Titlebar has border on bottom only */
    padding: 3px 5px 2px 5px;  /* Values clockwise: top, right, bottom, left */
    font: bold 11pt sans-serif;       /* Title font */
}

div.content {  /* Specifies size, position and scrolling for window content */
    position: absolute;         /* It's a positioned element */
    top: 25px;                  /* 18px title+2px border+3px+2px padding */
    height: 165px;              /* 200px total - 25px titlebar - 10px padding*/
    width: 290px;               /* 300px width - 10px of padding */
    padding: 5px;               /* Allow space on all four sides */
    overflow: auto;             /* Give us scrollbars if we need them */
    background-color: #ffffff;  /* White background by default */
}

div.translucent { /* this class makes a window partially transparent */
    opacity: .75;               /* Standard style for transparency */
    -moz-opacity: .75;          /* Transparency for older Mozillas */
    filter: alpha(opacity=75);  /* Transparency for IE */
}
</style>
</head>

<body>
<!-- Here is how we define a window: a "window" div with a titlebar and -->
<!-- content div nested between them. Note how position is specified with -->
<!-- a style attribute that augments the styles from the stylesheet. -->
<div class="window" style="left: 10px; top: 10px; z-index: 10;">
<div class="titlebar">Test Window</div>
<div class="content">
1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<br>9<br>0<br><!-- Lots of lines to -->
1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<br>9<br>0<br><!-- demonstrate scrolling-->
</div>
</div>

<!-- Here's another window with different position, color, and font weight -->
<div class="window" style="left: 75px; top: 110px; z-index: 20;">
<div class="titlebar">Another Window</div>
<div class="content translucent"
     style="background-color:#d0d0d0; font-weight:bold;">
This is another window. Its <tt>z-index</tt> puts it on top of the other one.
CSS styles make its content area translucent, in browsers that support that.
</div>
</div>
</body>
